Wall board



1934- c. A; WALKER ET AL 1,970,989

WALL BOARD ori inal Filed Dec. 8, 1930 2 Sheets-Sheet 1 0000000 d .emee-er Q ooooooo I nvniord 21, 1934- c. A. WALKER El' AL 1,970,989

WALL BOARD Original Filed Dec. 8, 1930 2 Sheets-Sheet 2 Inventors fizmmih fl Home y Patented Aug. 21, 1934 v WALL BOARD V Car-1A. Walker ma Leonard n. Booth- San Antonio, Tex.

Original application December 3, 1930, Serial No.

500,895, now Patent No. 1,936,317, dated November 21, 1933. Divided and this application. October 25,- 1933, SerialNo. 695,177

1 Claim. 01. 72-16) 'This invention relates to certain new and useful improvements in wall boards, and the primary object of the invention is to providea wall board construction, which-will permit'of providing a l joint between the several sections of such a character that when'the wall formedfrom the sections is completed, the joints between the several sections will be practically unnoticeable. As is-w'ell known in the art, walls formed from wall boards include a plurality of wall board sections arranged in edge to edge relation and a "metallic strip or tape issecured toad'jacent edge portions of the sections and the strip or tape maintained in position through the medium of a plastic material such as putty or the like which must be tapered out from 'the'strip far enough'to attempt to hide the joint. This particular manner of joining the wall board's'ections so as to hide the joints "therebetween has failed to accomplish its particular purpose since the putty and strip applied to the sur-' face of the wall board section will not present a surface flush'with the surface of the'wall bo'ard so that upon almost casual observation one may determine just where the corresponding -'edges of adjacent wall board sections abut one another.

The manner in which we overcome this'difli culty will be best-understood from a study of the following description, taken in connection with the accompanying drawings wherein is illustrated I a preferred embodiment of the invention.

The present application is a division of our application for Wall board and metal joint cover Serial No. 500,895 filed by us December 8, 1930 and allowed May 2, 1933 and issued as Patent No.

. 1,936,317, November 21, 1933.

In the drawings:

Figure 1 is a plan view showing two wall board sections embodying the features of the present invention and illustrating the manner of concealing the joints therebetween in accordance with the present invention.

Figure 2 is a transverse sectional View taken substantially on the line 22 of Figure 1.

Figure 3 is a transverse sectional view through a modified form of metal tape.

Figure 4 is a similar view through still another form of metal tape.

Figure 5 is a perspective view illustrating a portion of a wall and the preferred manner of mounting the improved wall board thereon, and

Figure 6 is a plan view of the improved wall board.

With reference more in details to the drawings it will be seen that the improved wall board section which is formed from ypsum, plaster of Paris, or like material is designated generally by the reference character'5, and on one face 'at its marginal edge provided with a recess or groove 6 extending along all its'm'ar'ginal" edge portion. The recess 6 is formed by reducing the marginal edge-portion in thickness whereby the grooved face side of the board'is provided with araised portion providing inwardly from the marginal edge of theboard a continuous shoulder 8.

' When the sections are arranged in edge to" edge relation "forcompleti'ng a wall structure, it will be seen that the" joint between the sections, that is to say where the "corresponding edges of adjacent sections-confront one another, the reduced portions 6 provide grooves for accommodating a strip or tape 'Zo'f metalfi The strip or tape '7 is of such a width as to have its edges contact the shoulders 8,'th'e='strip thus fitting snugly within the groove between opposed shouldersB and intersecting the joint between the confronting edges of adjacent wall board sections. 4

Under and overthe strip 7 is applied a plastic material such as putty or the like, and the strip 7 is provided with perforations 9 to insure proper contact of tlie plastic material with the strip for securing the 'strip'in position. The plastic material is then'leveied so 'as to provide a surface flush with the surface of the'w'all board section. When completed the wall will have a smooth flat surface, and when painted, or finished in any other manner the joints between the wall boards will be slightly if at all discernible.

The wall board sections 5 are secured to the wall studding W by suitable nails or other fastening elements N, and the nails or fastening elements are preferably driven through the reduced edge portions of the sections at the ends of the section, and through the thickest portion of the body of each section when nailed to a studding between the ends of the section.

Usually, and as shown in Figure 2 the strip of metallic tape 7 is flat on both faces. We propose however, to substitute for the flat strip a strip that is substantially T-shaped in cross section as shown to advantage in Figures 3 and 4. While the T-shaped strip may be, and preferably is formed of one piece, said strip in the present instance is formed from two elongated pieces or sections 9 and 10 respectively provided at said contacting edges with flanges 11 and 12, the

upper portion of the flange 11 being bent over the upper edge of the flange 12 and clinched as at 13. Thus the sections are secured together and the flanges 11 and 12 provide as it were a rib of the -Shaped strip. The strip is adapted to be inserted in the space between the confronting edges of the two adjacent wall board sections 5 with the main body portions of the strips 9 and 10 resting in the groove provided by the reduced edge portion of the wall board sections. In that embodi ment of theinventionshown in -Figure"4 the. tape therein is of angular construction being best adaptable for use at corners and angles for concealing the joint. In this connection it will be seen that the tape comprises two sections 9', 10',

respectively disposed at right angles to each other.

The section 9 adjacent one edge thereof is protion of the flange 11' being'bent over-the edge portion of the section 10 ;as-.at"13- whereby to,

provide at the junction of the sectionsiyand 10f therib12.

From the foregoing then it will be seen thatin providing a wall board or as may be stated a wall board section that is countersunk or reduced ad-g jacent its marginal edges the joints between the adjacent wall board sectionjcomprising the wall structure may be renderedsubstantially invisible, especially to the casual observen-v 3 ,When securing the wall boards ,to thestudding thereare preferably arranged as shown in Figure 5so as to break the vertical joint-between theendsof the board. Theend edge portionsof the board} thereto of a thin plaster-coatasisrequired by composition wall boards, suchwall boards of ,g-yp;

sum, plaster of Paris, or the like m ay.b.e. arranged as shown in Figure 5. 1 v

At the present time wall boards formedof gyp: sum, plaster of Paris andsimilar substancawhen provided with grooves, have such grooves only ad jacent two opposite longitudinal edges thereof ree quiring the board, in the construction of a wall,

for eirample, to be placed perpendicularly precluding any such arrangement of the boards assug gested in Figure Swhereby to break the vertical joints between the ends'ofthe board as is now possible, we have found, where such boards have the grooves or reduced portions at all of its marginal edges.

In actual practice it has also been found that by having wall boards formed. of the material above suggested provided witha groove or reduced portion at all of its marginal edges there is'a great saving of material in completing the wall for the reason that through the medium of a suitable tool, and when it is necessary to cut away or dispense "with a; portion of the board 5 a groove corresponding to the groove 6, and paralleling the line vided with a lateral flange 11 which overlaps one f edge portion of the section 10', the free edge por ofcut may be made during the cutting operation so that when the cutting operation is completed, the edge of the board formed by the cut will present a groove forming a continuation of the groove 6; --In other words, after a cutting operation the board will have in every respect the appearance of the original board 5, differing from 'the original board 5 only in size.

g Further, and as is obvious where the boards are provided only on each of two side edges with a reduced or recessed edge portion the joints at the other two ends-or edge portions of the board will notof course bev of the same nature as the joints between the confronting smooth edges of adjacent wall board; or in other words, the joints between confronting edges of the adjacent boards will not beuniform. M g v What isclaimedis; J r r r ,A wall structure consisting of a plurality of wall boards inedge to edge relation and joint strips between the boards, each board being formed of gypsum or the like and having a marginal recess in. its outer face, whereby all four edges of the board are of less thickness than the major part of the board, said recess being of greater depth than the thickness of the joint strips placed in the recesses of adjacent boards, whereby the outer faces. of saidstrips are located in planes inwardly 

